Homework SourseTime magazine reported the result of a telephone poll of 800
Time magazine reported the result of a telephone poll of 800 adult Americans. The question posed of the Americans who were surveyed was: \"Should the federal tax on cigarettes be raised to pay for health care reform?\" The results of the survey were:
Non-Smokers
Smokers
n1 = 605
n2 = 195
y1 = 351 said
| Non-Smokers | Smokers |
| n1 = 605 | n2 = 195 |
| y1 = 351 said |
Solution
The test statistic is
Z=(p1-p2)/sqrt(p1*(1-p1)/n1+p2*(1-p2)/n2)
=(0.58-0.21)/sqrt(0.58*(1-0.58)/605+0.21*(1-0.21)/195)
=10.45
![Time magazine reported the result of a telephone poll of 800 adult Americans. The question posed of the Americans who were surveyed was: \](/WebImages/23/time-magazine-reported-the-result-of-a-telephone-poll-of-800-1057169-1761551716-0.webp "Time magazine reported the result of a telephone poll of 800 adult Americans. The question posed of the Americans who were surveyed was: \")
